Comment line

There's a new command bound by C-x C-; by default that invokes comment-line,
it comments the line out without having to select a region.

Un-pretty symbols when cursor or point is over them

The pretty symbols are nice, they change the pretty symbol so you can see what
it originally was.

If you set prettify-symbols-unprettify-at-point to t, it means anytime the
cursor is in it, show the original. You can also set it to right-edge which
will show the un-pretty symbol if the cursor is on the right edge of the pretty
symbol.